KR100591422B1 - Can type secondary battery - Google Patents

Can type secondary battery Download PDF

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Publication number
KR100591422B1
KR100591422B1 KR20040060088A KR20040060088A KR100591422B1 KR 100591422 B1 KR100591422 B1 KR 100591422B1 KR 20040060088 A KR20040060088 A KR 20040060088A KR 20040060088 A KR20040060088 A KR 20040060088A KR 100591422 B1 KR100591422 B1 KR 100591422B1
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KR
South Korea
Prior art keywords
plate
terminal
secondary battery
side
formed
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Application number
KR20040060088A
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Korean (ko)
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KR20060011315A (en
Inventor
김창섭
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삼성에스디아이 주식회사
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Priority to KR20040060088A priority Critical patent/KR100591422B1/en
Publication of KR20060011315A publication Critical patent/KR20060011315A/en
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Publication of KR100591422B1 publication Critical patent/KR100591422B1/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/34Current conducting connections for cells with provision for preventing undesired use or discharge, e.g. complete cut of current
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/22Fixed connections, i.e. not intended for disconnection
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/34Current conducting connections for cells with provision for preventing undesired use or discharge, e.g. complete cut of current
    • H01M2/347Current conducting connections for cells with provision for preventing undesired use or discharge, e.g. complete cut of current in response to shock
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/30Terminals

Abstract

The present invention relates to a can type secondary battery. In particular, in the case of a can type secondary battery, when the secondary battery is deformed by an external impact, the can type secondary battery improves the safety of the secondary battery by reducing the heat generation by inducing a short circuit between metals in the secondary battery. It relates to a battery.
Can type secondary battery, cap assembly, cap plate, terminal plate, short circuit between metals

Description

Can Type Secondary Battery

1 is an exploded perspective view showing a conventional can-type secondary battery.

Figure 2 is an exploded perspective view showing a can type secondary battery according to an embodiment of the present invention.

3 is a partial cross-sectional view of a can type secondary battery according to an exemplary embodiment of the present invention.

Figure 4a is a bottom view of the insulating plate according to an embodiment of the present invention.

4B is a side view of FIG. 4A.

Figure 5a is a bottom view of the insulating plate according to another embodiment of the present invention.

5B is a side view of FIG. 5A.

6 is a bottom view of an insulating plate according to another embodiment of the present invention.

Figure 7 is a cross-sectional view A-A bottom of Figure 3;

8 is a bottom cross-sectional view in the same part as FIG. 7 when the secondary battery according to the present invention is deformed by longitudinal compression.

<Description of Symbols for Major Parts of Drawings>

210-Can 220-Cap assembly

230-Electrode terminal 240-Cap plate

250, 250a, 250b-Insulated Plate 260-Terminal Plate

The present invention relates to a can type secondary battery. In particular, in the case of a can type secondary battery, when the secondary battery is deformed by an external impact, the can type secondary battery improves the safety of the secondary battery by reducing the heat generation by inducing a short circuit between metals in the secondary battery. It relates to a battery.

In general, as the light weight and high functionalization of portable wireless devices such as a video camera, a portable telephone, a portable computer, and the like progress, many studies have been conducted on secondary batteries used as driving power. Such secondary batteries include, for example, nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries are rechargeable, compact, and large-capacity, and are widely used in advanced electronic devices because of their high operating voltage and high energy density per unit weight.

1 is an exploded perspective view of a conventional can-type secondary battery.

The can type secondary battery accommodates the electrode assembly 112 including the positive electrode plate 113, the negative electrode plate 115, and the separator 114 together with the electrolyte in the can 110, and the upper opening 110a of the can 110. Is formed by sealing the cap assembly 120.

The cap assembly 120 includes a cap plate 140, an insulation plate 150, a terminal plate 160, and an electrode terminal 130. The cap assembly 120 is coupled to a separate insulating case 170 to be coupled to the upper opening 110a of the can to seal the can 110.

 The cap plate 140 is formed of a metal plate having a size and shape corresponding to that of the upper opening 110a of the can 110. The terminal hole 1 141 of a predetermined size is formed in the center of the cap plate 140, the electrode terminal 130 is inserted into the terminal hole 1 (141). When the electrode terminal 130 is inserted into the terminal through-hole 1 (141), a tubular gasket tube 146 is coupled to the outer surface of the electrode terminal 130 for insulation between the electrode terminal 130 and the cap plate 140. Are inserted together. Meanwhile, the electrolyte injection hole 142 is formed at one side of the cap plate 140 at a predetermined size on the other side of the cap plate 140. After the cap assembly 120 is assembled to the upper opening 110a of the can 110, electrolyte is injected through the electrolyte injection hole 142, and the electrolyte injection hole 142 is sealed by a stopper 143.

The electrode terminal 130 is connected to the negative electrode tab 117 of the negative electrode plate 115 or the positive electrode tab 116 of the positive electrode plate 113 to act as a negative electrode terminal or a positive electrode terminal.

The insulating plate 150 is formed of an insulating material such as a gasket and is coupled to the bottom surface of the cap plate 140. The insulating plate 150 has a terminal through-hole 2 151 into which the electrode terminal 130 is inserted at a position corresponding to the terminal through-hole 1 141 of the cap plate 140. A mounting groove 152 corresponding to the size of the terminal plate 160 is formed on the bottom surface of the insulating plate 150 so that the terminal plate 160 is seated.

The terminal plate 160 is formed of Ni metal or an alloy thereof, and is coupled to the bottom surface of the insulating plate 150. The terminal plate 160 is provided with a terminal through hole 3 161 into which the electrode terminal 130 is inserted at a position corresponding to the terminal through hole 1 141 of the cap plate 140, and the electrode terminal 130. Is insulated by the gasket tube 146 and coupled through the terminal through hole 1 141 of the cap plate 140, so that the terminal plate 160 is electrically insulated from the cap plate 140 while the electrode terminal 130 is insulated from the gasket tube 146. Is electrically connected).

Meanwhile, the electrode terminal 130 is coupled to the cap plate 140, the insulating plate 150, and the terminal plate 160 by applying a constant force while rotating the electrode terminal 130. It is inserted into the through-hole 1 (141). When the electrode terminal 130 passes through the terminal through hole 1 141, the terminal through hole 2 151 and the terminal formed on the insulation plate 150 and the terminal plate 160 are coupled to the lower surface of the cap plate 140 again. It passes through the through hole 3 (161). At this time, the inner diameter of the terminal through-hole 2 (151) formed in the insulating plate 150 is formed to be the same as or slightly larger than the outer diameter of the electrode terminal 130 is inserted, and when the electrode terminal 130 is inserted into the electrode terminal 130 The outer surface is in close contact and is forcibly inserted.

Such lithium ion secondary batteries are exposed to a risk of voltage burst due to internal short circuit, external short circuit or overcharge and discharge of the electrode assembly, and thus the battery is ruptured. In order to prevent a short circuit inside the secondary battery, an insulating tape is attached to a portion of the electrode assembly including the ends of the positive electrode plate and the negative electrode plate and the electrode tab welding part, which is at risk of a short circuit. In addition, the secondary battery is electrically connected to safety devices such as positive temperature coefficient (PTC) elements, thermal fuses, and protection circuits. These safety devices are designed to provide current when the voltage or temperature of the battery increases rapidly. This prevents the battery from bursting in advance.

However, when the secondary battery is deformed by impact or pressure, the protection circuit or the protection device cannot prevent a short circuit between the electrodes. When the positive electrode and the negative electrode are shorted to each other, current flows rapidly from the positive electrode plate to the negative electrode plate, and thus the positive and negative plates themselves. Since the heat is generated by the resistance, there is a problem that the degree of heat is severe. In addition, when the heat is severe, the secondary battery may be exploded.

The present invention has been made to solve the above problems, and particularly relates to a can-type secondary battery, in particular in the case of the can-type secondary battery when the secondary battery is deformed by an external pressure or impact induces a short circuit between the metal inside the secondary battery The purpose of the present invention is to provide a can type secondary battery which improves the safety of the secondary battery by reducing heat generation.

In order to solve the above problems, the can-type secondary battery of the present invention includes an electrode assembly including a positive electrode plate, a negative electrode plate, and a separator, a can containing the electrode assembly and the electrolyte, a cap plate, an insulating plate, an electrode terminal, and a terminal. In the can-type secondary battery including a cap assembly including a plate and coupled to the top opening of the can to seal the can, the insulating plate is at least one side of the insulating plate around the terminal through which the electrode terminal is inserted It is formed in a size corresponding to the terminal plate is coupled to the lower surface, characterized in that the inner plate of the terminal plate and the can is in contact when the can is deformed in the longitudinal compression.

In addition, in the present invention, the insulating plate is formed with a size corresponding to the terminal plate on one side of the terminal through the hole, the other side is extended to a predetermined width of the negative electrode plate on the terminal plate coupled to the lower surface of the insulating plate The negative electrode tab may be formed to be welded.

In addition, in the present invention, the insulating plate has a bottom plate to which the terminal plate is coupled and has sidewalls protruding downward from each side end and side of the bottom plate, and at least one side end wall of the sidewall with respect to the terminal through-hole. The side wall may be removed to form a size corresponding to the terminal plate.

In addition, in the present invention, the insulating plate may be formed to be removed so that the side end wall removed from one side remains in a predetermined width.

In addition, in the present invention, the side end wall remaining on one side of the insulating plate is preferably formed within 50% of the width of the insulating plate.

In addition, in the present invention, the height of the sidewall is preferably formed at least the height of the terminal plate.

In addition, in the present invention, the insulating plate may be formed with a welding groove at a position corresponding to the position where the negative electrode tab of the terminal plate is welded on the side wall formed on the side of the other side of the terminal through-hole.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is an exploded perspective view illustrating a can type secondary battery according to an exemplary embodiment of the present invention. 3 is a partial cross-sectional view of a can type secondary battery according to an exemplary embodiment of the present invention. 4A shows a bottom view of an insulating plate according to an embodiment of the present invention. 4B shows a side view of FIG. 4A. Figure 5a shows a bottom view of an insulating plate according to another embodiment of the present invention. FIG. 5B shows a side view of FIG. 5A. 6 is a bottom view of an insulating plate according to another embodiment of the present invention. FIG. 7 is a cross-sectional view taken along the line A-A of FIG. 3. FIG. 8 is a bottom cross-sectional view of the same part as FIG. 7 when the secondary battery according to the present invention is deformed by longitudinal compression.

2 and 3, the can type secondary battery according to the present invention includes a can 210, an electrode assembly 212 accommodated in the can 210, and an upper end opening 210a of the can 210. It is formed to include a cap assembly 220 for sealing). In addition, the cap assembly 220 includes an insulating plate 250 such that the terminal plate 260 constituting the cap assembly 220 is short-circuited with the inside of the can 210 when the secondary battery is deformed by an external force. Formed.

The can 210 is formed of a metal material having a substantially box shape, and is preferably formed of light and ductile aluminum or aluminum alloy, but is not limited thereto. The can 210 may include an upper opening 210a having one surface thereof opened, and the electrode assembly 212 may be received through the upper opening 210a.

The electrode assembly 212 includes a positive electrode plate 213, a negative electrode plate 215, and a separator 214. The positive electrode plate 213 and the negative electrode plate 215 may be stacked through a separator 214 and then wound in a jelly-roll form. The positive electrode tab 216 is welded to the positive electrode plate 213, and an end portion of the positive electrode tab 216 protrudes upward from the electrode assembly 212. The negative electrode tab 217 is also welded to the negative electrode plate 215, and an end portion of the negative electrode tab 217 also protrudes above the electrode assembly 212.

The cap assembly 220 includes a cap plate 240, an insulating plate 250, a terminal plate 260, an electrode terminal 230, and an insulating case 270. The cap assembly 220 is coupled to a separate insulating case 270 is coupled to the upper opening 210a of the can 210 to seal the can 210.

 The cap plate 240 is formed of a metal plate having a size and shape corresponding to the top opening portion 210a of the can 210, and preferably is made of light aluminum or an aluminum alloy. The terminal plate hole 4 241 of a predetermined size is formed in the center of the cap plate 240, the electrolyte injection hole 242 is formed on one side. An electrode terminal 230 is inserted into the terminal through hole 4 241, and a tubular gasket tube 246 is inserted into an inner surface of the terminal through hole 4 241 to insulate the electrode terminal 230 from the cap plate 240. Are assembled.

The electrolyte injection hole 242 is formed in a predetermined size on one side of the cap plate 240. After the cap assembly 220 is assembled to the upper opening 210a of the can 210, electrolyte is injected through the electrolyte injection hole 242, and the electrolyte injection hole 242 is sealed by a stopper 243.

The insulating plate 250 is formed of an insulating material such as a gasket, and includes a bottom plate 252 and sidewalls 253 protruding downward from each side and side ends of the bottom plate. In addition, the insulating plate 250 is formed to include a terminal through-hole 5 (251) formed at a predetermined position. The insulating plate 250 is coupled to the bottom surface of the bottom plate 252 of the cap plate 240, and the bottom plate 252 is formed with an area corresponding to the terminal plate 260. In addition, the sidewall 253 of the insulating plate 250 is formed higher than the thickness of the terminal plate 260.

The terminal through hole 5 251 is formed at a position corresponding to the terminal through hole 4 241 of the cap plate 240 when the insulating plate 250 and the cap plate 240 are coupled to each other, and the electrode terminal ( 230) is inserted. The terminal through hole 5 251 is preferably positioned to one side from the center of the insulating plate 250.

4A and 4B, when the side wall 253 is formed, at least one side end wall and side wall of the insulating plate 250 are removed from the bottom plate to form a bottom plate. Only 252 is formed. Therefore, one side from which the sidewall 253 of the insulating plate 250 is removed is formed to have a size corresponding to that of the terminal plate 260, and the side end and the side of the insulating plate 250 coincide with the side end and the side of the terminal plate. Done.

In addition, the insulating plate 250 has no side wall 253 formed thereon, and the bottom plate 252 is formed larger than the terminal plate 260, and one side of the insulating plate 250 is formed around the terminal hole 5 251. Of course, it can be formed in a size corresponding to 260).

The terminal plate 260 is formed of Ni metal or an alloy thereof, and is coupled to the bottom surface of the bottom plate 253 of the insulating plate 250. The terminal plate 260 is formed with a terminal through hole 6 261 at a position corresponding to the terminal through hole 4 241 of the cap plate 240, the electrode terminal 230 is inserted.

The electrode terminal 230 is insulated by the gasket tube 246 while being inserted through the terminal through hole 4 241 and the terminal through hole 5 251 and the terminal through hole 661 of the cap plate 240 to be inserted into the terminal plate ( 260). Therefore, the terminal plate 260 in the cap assembly 220 is electrically insulated from the cap plate 240 and electrically connected to the electrode terminal 230.

The insulating case 270 is formed to include the positive electrode tab hole 271 and the negative electrode tab hole 272, and is coupled to the lower portion of the cap assembly 220 to electrically connect the cap assembly 220 and the electrode assembly 212. Insulated. In this case, the positive electrode tab 216 is connected to the cap plate 240 through the positive electrode tab hole 271. In addition, the negative electrode tab 217 is connected to the terminal plate 260 through the negative electrode tab hole 272.

Figure 5a shows a bottom view of an insulating plate according to another embodiment of the present invention, Figure 5b shows a side view of Figure 5a.

5A and 5B, the insulating plate 250a according to the present exemplary embodiment is formed of an insulating material such as a gasket and moves downward from each side and side ends of the bottom plate 252a and the bottom plate 252a. It is formed including a protruding side wall 253a. In addition, the insulating plate 250a is formed to include a terminal through hole 5 (251) formed at a predetermined position.

Part of the side wall 253a is removed from one side of the insulating plate 250a with respect to the terminal through hole 5 251a, and at one side end at which the side wall 253a is removed, the side end wall 254a remains in a predetermined width. Is formed. The width of the side end wall 254a is preferably formed within 50% of the width of the insulating plate 250a. If the width of the side end wall 254a is too wide, the terminal plate 260 coupled to the bottom surface of the insulating plate may not contact the inner wall of the can when the terminal plate 260 is rotated. The height of the side end wall 254a is formed at the same height as the side wall 253a, and is preferably higher than the thickness of the terminal plate 260.

Therefore, the side end wall 254a of the insulating plate 250a prevents the side end of the terminal plate 260 from being short-circuited with the electrode tab. In more detail, the positive electrode tab 216 or the negative electrode tab 217 protruding from the upper end of the electrode assembly 212 is bent by welding to the cap plate 240 and the terminal plate 260 with a thin metal. Accordingly, the positive electrode tab 216 and the terminal plate 260 may be short-circuited in the process of bending the positive electrode tab 216 or assembling the cap assembly 230 to the can 210. 254a prevents the positive electrode tab 216 and the terminal plate 260 from being short-circuited.

Figure 6a shows a bottom view of an insulating plate according to another embodiment of the present invention, Figure 6b shows a side view of Figure 6a.

Referring to FIGS. 6A and 6B, the insulating plate 250b according to the present embodiment is formed of an insulating material such as a gasket and moves downward from each side and side ends of the bottom plate 252b and the bottom plate 252b. It is formed including a protruding side wall 253b. In addition, the insulating plate 250b is formed to include a terminal through hole 5 (251) formed at a predetermined position.

When the side plate 253b is formed, the insulating plate 250b has only a bottom plate 252b formed by removing side end walls and side walls from at least one side of the terminal through hole 5 251. Therefore, one side from which the sidewall 253b of the insulating plate 250b is removed is formed to have a size corresponding to that of the terminal plate 260, and the side ends and side surfaces of the insulating plate 250b are formed at the side ends of the terminal plate 260. Will coincide with the sides.

In addition, the side wall 253b has a welding groove (1) at one side of the position where the negative electrode tab 217 is welded to the terminal plate 260 coupled to the insulating plate 250b on the other side of the terminal through hole 5 251. 255b) is formed. Since the height of the sidewall 253b is preferably higher than the height of the terminal plate, the negative electrode tab 217 is perfectly formed on the bottom surface of the terminal plate 260 when welding the negative electrode tab 217 to the terminal plate 260. Contact and welding become difficult. Therefore, the welding groove 255b allows the negative electrode tab 217 to be in close contact with the bottom surface of the terminal plate 260 to facilitate welding.

Next, the operation of the secondary battery according to the present invention will be described.

7 is a cross-sectional view taken along the line A-A of FIG. 3, showing a bottom cross-sectional view of a cap assembly of a secondary battery according to the present invention. 8 is a bottom cross-sectional view of the same part as FIG. 7 when the secondary battery according to the present invention is deformed by longitudinal compression.

Referring to FIG. 7, when the cap assembly 220 is welded to the positive electrode tab 216 and the negative electrode tab 217 on the lower surface thereof and is coupled to the upper opening 210a of the can 210, the terminal plate 260 is formed. Is spaced apart from the inner wall of the can 210 by a predetermined distance to maintain an electrically insulated state. Accordingly, the positive electrode tab 216 and the negative electrode tab 217 are also electrically insulated from each other.

When the secondary battery undergoes deformation such as longitudinal compression in the can 210 due to external pressure or shock, the positive electrode plate 213 and the negative electrode plate 215 are separated inside the electrode assembly 212 in the can 210. Shorting while damaging 214. Therefore, current flows between the positive electrode plate 213 and the negative electrode plate 215, and heat is generated by internal resistances of the positive electrode plate and the negative electrode plate.

In addition, as shown in FIG. 8, when the can 210 is deformed, an inner surface of the can 210 and an edge of the terminal plate 260 contact each other at a predetermined point (a) and are electrically shorted. That is, since the can 210 is connected to the cap plate 240 and the positive electrode tab 216, and the terminal plate 260 is connected to the negative electrode tab 217, the positive electrode and the negative electrode of the secondary battery are short-circuited. Since the can 210 and the terminal plate 260 are metals with low electrical resistance, when a short circuit occurs between these metals, current flows rapidly, but heat is generated relatively little.

Table 1 shows the results of measuring the resistance and the heat generation according to the short circuit type of the electrode assembly and the can. In Table 1, the short circuit type represents a short-circuit component between the components of the electrode assembly or in the can, and the electrical resistance represents the electrical resistance measured between the positive electrode tab and the negative electrode tab after the short circuit is formed according to each type. In addition, the short circuit temperature indicates the temperature generated by the electrical resistance after the short circuit is formed. The method of measuring the resistance and the short circuit temperature between the components will be described by taking a short circuit between the positive and negative electrodes as an example. Electrical resistance is measured by contacting the positive and negative electrodes cut to a predetermined size between two slide glasses and applying current between both ends. At this time, the current should be prepared to be discharged from the actual battery which is safely charged to simulate the maximum discharge current of the cell. The heat of resistance is calculated by calculating from the measured electric resistance. The short circuit temperature is measured by attaching a thermocouple to the outside of the slide glass.

Paragraph type Electrical resistance (ohm) Resistance heat (J) Short circuit temperature (℃) Positive Plate-Negative Plate 11.00 3,564 More than 150 Positive Plate-Negative Tab 8.70 7,830 More than 100 Can-Negative Plate 5.10 2,040 More than 150 Can-Cathode Tab 0.02 24 60 Positive Tab-Negative Tab 0.04 36 65

As shown in Table 1, when a short circuit is formed between the positive electrode plate or the negative electrode plate and other components, the electrical resistance and resistance heat increase, and the short circuit temperature increases. However, when a short circuit occurs between metals such as a can and a positive electrode tab, a positive electrode tab, and a negative electrode tab, heat of resistance and temperature rise are relatively small.

Therefore, in the cap assembly as in the present invention, when the secondary battery is deformed by longitudinal compression, a short circuit between metals occurs between the terminal plate and the can, thereby minimizing the heat of resistance and the increase of the internal temperature of the battery.

As described above, the present invention is not limited to the specific preferred embodiments described above, and any person having ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Various modifications are possible, of course, and such changes are within the scope of the claims.

According to the can-type secondary battery according to the present invention, when the secondary battery is deformed by an external impact, the secondary battery has an effect of improving the safety of the secondary battery by reducing the heat generation by inducing a short circuit between metals in the secondary battery.

Claims (7)

  1. An electrode assembly including a positive electrode plate, a negative electrode plate, and a separator, a can containing the electrode assembly and the electrolyte, a cap plate, an insulating plate, an electrode terminal, and a terminal plate, and are coupled to an upper opening of the can to seal the can. In the can type secondary battery comprising a cap assembly to be,
    The insulating plate is formed to have a size corresponding to the terminal plate at least one side of the terminal through which the electrode terminal is inserted is mounted on the lower surface of the insulating plate, when the can is deformed to longitudinal compression of the terminal plate and can Can-type secondary battery, characterized in that the inner surface is formed in contact.
  2. The method of claim 1,
    The insulating plate is formed with a size corresponding to the terminal plate on one side of the terminal through the hole, the other side is extended to a predetermined width and the negative electrode tab of the negative electrode plate is welded to the terminal plate coupled to the lower surface of the insulating plate Can-type secondary battery, characterized in that.
  3. The method of claim 1,
    The insulating plate has a bottom plate to which the terminal plate is coupled and sidewalls protruding downward from each side end and side of the bottom plate, and side end walls and sidewalls of the sidewalls are formed at least on one side of the terminal through-hole. Can-type secondary battery, characterized in that removed to form a size corresponding to the terminal plate.
  4. The method of claim 3, wherein
    The insulating plate is a can-type secondary battery, characterized in that removed so that the side end wall removed from one side remains in a predetermined width.
  5. The method of claim 4, wherein
    The side end wall remaining on one side of the insulating plate is a can type secondary battery, characterized in that the width is formed within 50% of the width of the insulating plate.
  6. The method of claim 3, wherein
    The height of the side wall is at least the height of the terminal plate, characterized in that the can-type secondary battery.
  7. The method according to claim 3 or 5,
    And the insulating plate has a welding groove at a position corresponding to a position at which the negative electrode tab of the terminal plate is welded on a side wall formed at a side of the other side of the terminal through hole.
KR20040060088A 2004-07-30 2004-07-30 Can type secondary battery KR100591422B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20040060088A KR100591422B1 (en) 2004-07-30 2004-07-30 Can type secondary battery

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20040060088A KR100591422B1 (en) 2004-07-30 2004-07-30 Can type secondary battery
JP2005213981A JP4619221B2 (en) 2004-07-30 2005-07-25 Can-type secondary battery
US11/194,057 US7901809B2 (en) 2004-07-30 2005-07-28 Can-type secondary battery having a cap assembly for reducing excessive heating
CNB2005100888856A CN100411225C (en) 2004-07-30 2005-07-29 Jar-like secondary battery

Publications (2)

Publication Number Publication Date
KR20060011315A KR20060011315A (en) 2006-02-03
KR100591422B1 true KR100591422B1 (en) 2006-06-21

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US (1) US7901809B2 (en)
JP (1) JP4619221B2 (en)
KR (1) KR100591422B1 (en)
CN (1) CN100411225C (en)

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US20060051667A1 (en) 2006-03-09
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